GB/T 32119-2023 in English

VALID

Covering anticorrosion technology of multilayer petrolatum for marine steel structures

Issued on:2023-09-07
Implemented on:2024-04-01
File Format:PDF
Delivery:Via email within 5 business days

Price(USD)： $490.00
$476.00

Standard No:	GB/T 32119-2023
Document status:	VALID
Title in English:	Covering anticorrosion technology of multilayer petrolatum for marine steel structures
Title in Chinese:	海洋钢制构筑物复层矿脂包覆腐蚀控制技术
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 5 business days
Issued on:	2023-09-07
Implemented on:	2024-04-01
Superseding:	GB/T 32119-2015 Covering anticorrosion technology of multilayer petrolatum for marine steel structures
ICS Classification:	77.060-Corrosion of metals
Chinese Classification:	A29-Material Protection
Professional Classification:	GB-National Standard
Related Keywords:	petrolatum anti-corrosion paste performance indicatorstensile strength/insulation resistivitychanged marine steel structures introduction background anticorrosion technology multilayer petrolatum steel structure
Related Topics:	GBT32119 GB/T 32119-2015 Clad steel technology gb/t 32119-2023

《GB/T 32119-2023海洋钢制构筑物复层矿脂包覆腐蚀控制技术》由TC381（全国腐蚀控制标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。

Introduction

Background of Standard Revision and Technological Evolution

As the first revised version of GB/T 32119-2015, this standard focuses on optimizing the following technical aspects in response to the upgraded demand for corrosion protection in marine environments:

Revision Dimensions	2015 Edition	2023 Edition
Material System	Contains Sealing Putty	Cancel Sealing Putty and Enhance the Performance of Petrolatum Anti-Corrosion Paste
Performance Indicators	Tensile Strength/Insulation Resistivity	Changed to Breaking Strength/Insulation Resistance
Structural requirements	Basic sealing buffer layer	Increase the foaming rate (30-35 times) and thickness (10±0.5mm) precise control

Analysis of the core structure of the anti-corrosion layer

Three-layer protection system composition:

Mineral fat anti-corrosion pasteBase layer (180-250μm)
Mineral fat anti-corrosion tapeReinforcement layer (total thickness ≥1.6mm)
Anti-corrosion protective coverOuter shell (main body ≥3mm, flange 8-10mm)

Application case of a platform in Bohai Sea: After adopting this technology, the corrosion rate of steel structure in the splash zone dropped from 0.5mm/year to 0.02mm/year, and the protection period was extended to more than 15 years.

Key material performance requirements

Test items	Petroleum anti-corrosion paste	Petroleum anti-corrosion tape
Temperature resistance	No flowing at 50℃	No dripping at 45-65℃
Low temperature performance	No peeling at -20℃	Operable at -20℃
Salt spray resistance	192h/Grade A	1000h/Grade A

Key points of construction quality control

Surface treatment: must meet St2 grade rust removal standards
Aging control: complete the application of anti-corrosion paste within 6 hours, and install the protective cover within 24 hours
Thickness detection: ultrasonic thickness gauge + wet film thickness gauge double verification

Implementation suggestions

1. Environmental adaptation: The protection range of the splash zone should extend from 1m below the lowest tide level to 1.5m above the high tide level
2. Special nodes: irregular components require on-site protective covers, with a butt overlap of 50-100mm
3. Maintenance cycle: check the integrity of the protective cover and the tightening status of the bolts every six months

More samples: GB 18306-2015 JGJ 94-2008 JJG 21-2008

Sample only — not a preview of GB/T 32119-2023